000 00299nam a2200121Ia 4500
008 220201s1981 xx 000 0 eng d
082 _a910
_bAGA
100 _aAgarwal(MC), Sharma(SC)
245 0 _aPhysical & Economic World
260 _bSultan Chand
_aNew Delhi
_c1981
300 _a430
942 _2ddc
999 _c5934
_d5934